HYDRAULIC EXPERIMENT ON OUTFLOW PHENOMENON OF BACK FILLING MATERIAL AND ITS PREVENTION METHOD OF DRY MASONRY REVETMENTS

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  • 水理実験による空石積み護岸の吸い出し現象と防止策に関する基礎的研究

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<p> Dry masonry revetments had been used long time as traditional Japanese river revetments. From the landscape design and ecological view, there is still a lot of demand for dry masonry revetments. However, there is little knowledge about their strength and design method currently, it is difficult to select the method in case of revetment construction. For installation of dry masonry revetments, it is necessary to conduct scientific verification of the destruction behavior and strength of the method. We examined the outflow phenomenon of back filling sand material which is one of the fracture behavior of the dry masonry revetments by the hydraulic experiment. Following results are obtained. The outflow phenomenon can be prevented by filling the back filling gravel materials. The smaller diamater and the larger filling width of back filling gravel materials are the more effective to prevent the outfow phenomenon.</p>

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